Spring and power pull-back for baling-presses.



G. S GHUBERT. SPRING AND POWER PULL BACK FOR BALING PRESSES.

APPLIUATION FILED OCT. 7, 1909.

Patented Sept. 27, 1910.

UhllTFl) @TAT8 PATEN '1 GEORGE SCHUIBERYT, OF FORT WORTH, TEXAS.

To all whom it may concern:

Be it known that I, GEORGE SoHUBEn'r, a citizen of the United States, residing at Fort Worth, in the county of Tarrant and State of Texas, have invented a new and useful. Spring and Power Pull-Back for Baling- Presses, of which the following is a specification.

My present invention relates to a baling press in which the plunger-bar is moved in ward by power and drawn outward by a spring or by power. If a spring is used it is generally arranged to be tensioned during the inward movement of the plunger, which adds to the heavy energy needed to make the heavy pressure on the hay. And the heavy back pressure from the compressed material and the power of the spring cause the plunger-bar to kick back with much force as soon as the center of the roller carried by the power-head has passed the center of the plunger-bar, or the end of the cam; and as the plunger-bar thus forces its way backward it shifts the second half of the roller forward and swings the sweep of the powerhead forward correspondingly; which is also very disagreeable to the team and the operator. I overcome these objections, first, by pivoting the plunger-bar to an arm which is pivoted on the extension-beam and provided with cams to be operated on by rollers on a power-head, the first cam to move the plunger inward and the second cam to move the plunger outward, and second, by locating a strong spring on said arm, located to be compressed by a roller of the power-head at the time another roller of said powerhead moves around the end of the first cam, and thereby prevent the heavy forward swing of the sweep; and also avoid the labor of tensioning of the spring during the time the pressure is needed for the hay.

Figure 1 is a plan view of the power end of an extension-beam of a baler with the power-head and my improved mechanism; showing the plunger-bar near the end of its inward movement, and the next roller starting to compress the spring, and showing in dotted lines the spring compressed. Fig. 2 is a similar view, showing the plunger-bar moved back or outward and the spring expanded. Fig. 3 is a side view of the same mechanism. Figs. 4 and 5 are edge and. plan views of the arm to carry the spring and to operate the plunger-bar.

Specification of Letters Patent.

Application filed October 7, 1909.

Patented Sept. 2'7, 1910. Serial No. 521,587.

11 represents the extension beam, the power end of same only being shown.

12 is a seat or casting secured to the power end of the extension -beam and provided with a perforation 13, and a pivot 14- for the purpose later on noted.

15 is an arm having the long cam 16 and the short cam 17', and pivoted by its boss 18 in the perforation 13 above noted; and having pivoted to its swinging end the end of the plunger-bar 19.

20 is a lug formed on the back of the cam 16, some distance beyond the pivot of the arm, and perforated to receive a bolt 21.

23 is a spring on the bolt 21 resting with one end against the lug 20 or on the washers 24 and with its other end against a head 25 retained on the bolt 21.

26 is a support for the spring 23.

27 is the usual power-head located on the pivot 1 1-, and having the depending rollers 28, 28, 28, to operate the arm 15.

30 and 31 are lugs on the power-head to receive the usual sweep, not shown in the drawings.

In operating the press: the power-head is rotated in the direction of dotted lines in Fig. 1, and as one roller 28 passes the end of the cam 16 the other roller 28 compresses the spring as seen in dotted lines in, Fig. l; and the compressed spring being of ample strength to shift the plunger-bar and the arm 15 back, or at least to the position seen in dotted lines in Fig. 1, after which the roller 28 will engage the cam 17 and complete the rearward movement of the arm and plunger-bar to the position seen in Fig. 2; the spring 23 expanding again when it will swing at rightangle to its support or to the lug 20 as seen in Fig. 2, when the head 25 will be in line with the roller 28 when the arm .15 is shifted to the position seen in Fig. 1; and the operation above described is repeated.

The tension of the spring 23 can be regulated by the use of one or more washers 24: on the bolt 21., three are shown in the present-instance. The tension of the spring 23 should be adjusted to swing the plungerbar outward to its full extent so the cam 17 does not come in use except when a bad feed is made,

The perforation in the head 25, (shown in section in Fig. 2,) is of ample size to not 1 strain the bolt 21 when said head is pressed out of true. The lug 20 is formed on an angle to the arm 15 to bring the head 25 in the path of the roller 28 when the arm is turned to the position as seen in Fig. 1.

1. In a baling press of the kind described, an extension beam, a power-head pivoted thereon, rollers on said power-head, an arm having cams and pivoted Within the field of the power-head, lugs on said arm, a spring supported by said lugs, and compressed by the power-head to shift the plunger-bar out- Wardly.

2. In a baling press of the kind described, an extension beam, a power-head pivoted thereon, an arm having a main cam and pivoted Within the field of the power-head, a

lug on said arm, a spring supported by said lug, and compressed by the power-head to shitt the plunger-bar outwardly.

3. In a baling press of the kind described, an extension beam, a power-head pivoted thereon, rollers on said power-head, an arm having cams and pivoted Within the field of the power-head, a lug on said arm located on a specified angle, a spring on said lugs to project into the path of the rollers.

Signed at Fort lVorth, in the county of Tarrant and State of Texas.

GEORGE SCHUBERT.

lVitnesses F. H. ALLEN, V. A. MURRAY. 

